What is the structure of Chordata?

What is the structure of Chordata?

Animals in the phylum Chordata share four key features: a notochord, a dorsal hollow nerve cord, pharyngeal slits, and a post-anal tail.

What is chordate body plan?

The body plan of a chordate includes a post-anal tail, notochord, dorsal hollow nerve cord, and pharyngeal slits. In some chordates, all four traits persist throughout life and serve important functions. However, in many chordates, including humans, all four traits are present only during the embryonic stage.

What are characteristics of chordates?

The five characteristic features of chordates present during some time of their life cycles are a notochord, a dorsal hollow tubular nerve cord, pharyngeal slits, endostyle/thyroid gland, and a post-anal tail.

What are the 7 characteristics of a chordate?

Phylum Chordata possesses the following characteristic features:

• Notochord. It is a longitudinal, cartilaginous rod running between the nerve cord and the digestive tract.
• Dorsal Nerve Cord.
• Pharyngeal Slits.
• Post anal Tail.
• Urochordata.
• Cephalochordata.
• Vertebrata.
• Lampreys.

What defines Chordata?

Definition of chordate : any of a phylum (Chordata) of animals having at least at some stage of development a notochord, dorsally situated central nervous system, and gill slits and including the vertebrates, lancelets, and tunicates.

What are chordates Class 9?

A chordate is an animal belonging to the phylum Chordata; they possess a notochord, a hollow dorsal nerve cord, pharyngeal slits, an endostyle, and a post-anal tail, for at least some period of their life cycle.

Do chordates have a segmented body?

The arthropods, annelids, and chordates are universally considered segmented.

What makes a human a chordate?

There is a long list of characteristics that organisms have in Chordata phylum, but the most important is the notochord. Notochord is a flexible rod which runs along the back (dorsal) side of the animal. For humans, our notochord is developing into a spinal cord, making us a chordate.

Which symmetry is a fundamental character of Chordata?

bilateral symmetry
All chordates share four common characteristics: a nerve cord, a notochord, pharyngeal slits, and a postanal tail. Chordates, including humans, are also all classified as having bilateral symmetry and can be divided into a left and right side.

What are the five main characteristics of chordates?

Characteristics of Chordata. Animals in the phylum Chordata share five key chacteristics that appear at some stage during their development: a notochord, a dorsal hollow (tubular) nerve cord, pharyngeal gill arches or slits, a post-anal tail, and an endostyle/thyroid gland (Figure 2).

What is chordate give origin of chordates?

Chordates evolved from some deuterostome ancestor (echinoderms, hemichordates, pogonophorans etc.) as they have similarities in embryonic development, type of coelom and larval stages. Fossils of the earliest vertebrates are known from the Silurian-Devonian period, about 400 million years ago.

How does phylum Chordata reproduce?

While a few chordates reproduce asexually, most reproduce sexually, which is when an egg is fertilized by a sperm. And after fertilization, there are different ways that the embryo may develop. For oviparous animals, an egg will develop and hatch outside of its mother’s body, like with many fish and birds.

What animal is a chordate but not a vertebrate?

There are animals that are chordates but not vertebrates. Tunicates and amphioxus are two animals that are chordates but not vertebrates. Acorn worms have also be classified as chordates, not vertebrates.

Are humans considered a chordate?

Humans are not chordates because humans do not have a tail. Vertebrates do not have a notochord at any point in their development; instead, they have a vertebral column. The endostyle secretes steroid hormones.

What makes a chordate a vertebrate?

The key difference between vertebrates and chordates is that the vertebrates are a major subphylum of chordates that have a vertebral column while the chordates are highly evolved animals that possess a notochord, a dorsal nerve cord, pharyngeal slits, an endostyle, and a post-anal tail during some period of their life span.

Is a chordate and a vertebrate similar?

Similarities Between Chordates and Vertebrates Both chordates and vertebrates are deuterostomes. Both chordates and vertebrates are bilaterally symmetric coelomates. Both chordates and vertebrates consist of a notochord, nerve cord, pharyngeal gill slits, and a post-anal tail.